Air conditioning device capable of automatically detecting blockage

Abstract

An air conditioning device capable of automatically detecting blockage includes an air conditioner body, a filter mechanism, a pressure sensor, and also has a comparison circuit and a prompt circuit; the filter mechanism includes a filter housing, a filter screen, and a filter housing cover, and the filter housing is respectively provided with a liquid inlet and a liquid outlet on both sides, the filter screen is installed in the filter housing, and the filter housing cover is installed on the filter housing; there are openings on the liquid inlet and the liquid outlet, and an isolation tube is installed in each opening, and through holes are respectively provided on both sides of the isolation tube, and sealing bolts are threadedly installed in the isolation tube; pressure sensors are respectively installed on the upper part of the inlet pipe and outlet pipe of each set of filter mechanisms; the inlet pipe of the filter mechanism is connected to the outer end of the pipeline of the external compressor of the air conditioner body, and the outlet pipe of the filter mechanism is connected to the pipeline of the internal unit; the comparison circuit and the prompt circuit are installed in the component compartment of the internal unit and are electrically connected. The new type can filter out impurities in the two pipelines connected to the compressor, and can also prompt the machine owner when the impurity amount is relatively large, thereby improving the function of the air conditioner body.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner equipment, in particular to an air conditioner equipment capable of automatically detecting blockage. Background Art

[0002] The structure of the air conditioner includes an outdoor unit and an indoor unit. According to the ambient temperature and user needs, the user selects the working mode of the four-way valve through the remote control panel, which can switch the outdoor unit and the indoor unit between evaporation and condensation functions. When the indoor unit is in the evaporation state, the air conditioner provides a cooling mode for the room, and when the indoor unit is in the condensation state, the air conditioner provides a heating mode for the room. The outdoor unit compressor of the air conditioner has two pipes, one connected to the exhaust pipe of the indoor unit, and the other connected to the liquid inlet pipe of the indoor unit (in the indoor heating or cooling mode, the functions of the evaporator and condenser are interchangeable).

[0003] Air conditioners are affected by the manufacturing process and the materials used, or after maintenance, there is a probability of internal pipe blockage, such as copper chips, welding slag, dust, etc. generated during production or maintenance (including after a long period of use, due to poor pipe quality or other reasons, the inner wall of the pipe falls off and causes blockage). In addition, after production or maintenance, when the moisture in the air enters the pipeline without being treated accordingly, the water vapor is easy to condense into ice and form ice blockage. In the prior art, the air conditioner does not have the function of automatically detecting whether it has a blockage in the pipeline. Usually, the owner can only discover the situation and ask relevant technicians to perform maintenance after the air conditioner works abnormally. More importantly, since general users do not understand the working principle and cause of the air conditioner failure, when the maintenance personnel do not have good professional ethics, they may exaggerate the failure of the air conditioner, and then charge the user a relatively higher maintenance fee, causing unnecessary economic losses to the owner. In summary, it is very necessary to provide an air conditioning device that can detect whether the pipeline is blocked in real time. Utility Model Content

[0004] In order to overcome the problem that the existing air conditioners cannot automatically detect whether blockage occurs in the pipes due to structural limitations, and have the disadvantages as described in the background technology, the present invention provides an air-conditioning device that can automatically detect blockages based on the air-conditioning body. When the air-conditioning body is working, it can filter out impurities in the two pipes connected to the compressor in real time, and can immediately remind the owner when the amount of impurities is relatively large and affects the flow rate of the fluid. The owner can specifically understand the specific reasons for the abnormal operation of the air-conditioning body, thereby improving the function of the air-conditioning body and the market competitiveness of the product, and preventing the owner from being unaware and the maintenance staff from overcharging.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An air conditioning device capable of automatically detecting blockage comprises an air conditioner body, a filter mechanism and a pressure sensor, characterized in that it also comprises a comparison circuit and a prompt circuit; the filter mechanism comprises a filter housing, a filter screen and a filter housing cover, the filter housing is provided with a liquid inlet and a liquid outlet on both sides, the filter screen is installed in the filter housing, and the filter housing cover is installed on the filter housing; the liquid inlet and the liquid outlet are provided with openings respectively, an isolation tube is installed in each opening, through holes are provided on both sides of the isolation tube, and sealing bolts are threadedly installed in the isolation tube; pressure sensors are respectively installed on the upper part of the inlet pipe and the outlet pipe of each set of the filter mechanism; the inlet pipe of the filter mechanism is connected to the outer end of the pipeline of the external compressor of the air conditioner body, and the outlet pipe of the filter mechanism is connected to the pipeline of the internal unit; the comparison circuit and the prompt circuit are installed in the component compartment of the internal unit, the signal output end of the pressure sensor is electrically connected to the signal input end of the comparison circuit, and the signal output end of the comparison circuit is electrically connected to the signal input end of the prompt circuit.

[0007] Furthermore, the filter mechanism is made of stainless steel.

[0008] Furthermore, the comparison circuit includes electrically connected resistors and an operational amplifier, wherein one end of the first resistor and the second resistor are connected to the same-direction input terminal of the operational amplifier, the third resistor and one end of the fourth resistor are connected to the reverse input terminal of the operational amplifier, and the other end of the second resistor and the other end of the fourth resistor are connected to the negative power supply input terminal of the operational amplifier.

[0009] Furthermore, the prompt circuit includes an electrically connected resistor, a transistor and an indicator light, one end of the resistor is connected to the base of the transistor, and the collector of the transistor is connected to the negative power input end of the indicator light.

[0010] Furthermore, the filtering mechanism can also be installed on the side end of the inner machine.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model is based on the air conditioner body, and when the air conditioner body is working, the two sets of filtering mechanisms

[0012] It can filter out impurities in the two pipes connected to the compressor in real time. When necessary, the owner can check or clean the impurities filtered out by the filter by himself or ask maintenance personnel at an appropriate time, which minimizes the adverse effects of impurities blocking the pipeline on the operation of the air conditioner body; when the amount of impurities is relatively large and affects the flow rate of the fluid, the prompt circuit can prompt the owner in the first time, and the owner can understand the specific reasons for the abnormal operation of the air conditioner body, thereby improving the function of the air conditioner body and the market competitiveness of the product, and preventing the owner from being unaware and the maintenance staff from overcharging. In summary, the utility model has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the overall local structure of the utility model and a local enlarged structure of a set of filtering mechanisms therein.

[0015] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 , 2 As shown in, an air conditioning device capable of automatically detecting blockage includes an air conditioner body 1, a power supply module A1, a filter mechanism 2, a pressure sensor, and also has a comparison circuit 3 and a prompt circuit 4; the filter mechanism 2, the comparison circuit 3, and the prompt circuit 4 are respectively provided with two sets, and the pressure sensor is provided with four sets, and each set of the filter mechanism 2, the comparison circuit 3, and the prompt circuit 4 is used in conjunction with two sets of pressure sensors A2 and A3 (A5 and A6); each set of the filter mechanism includes a rectangular hollow filter shell 21, a filter screen 22 (200 mesh), and a filter shell cover 23, and the outer sides of the middle of the left and right ends of the filter shell 21 are respectively welded There is an inlet pipe 24 and an outlet pipe 25 which are interconnected with the interior thereof. The upper end of the filter housing 21 is an open structure and has a plurality of thread holes (not shown in the figure) on the upper part around it. There is a limit plate 28 (which will not isolate the two ends of the filter housing) on ​​the front and rear ends and the left and right sides of the middle part of the filter housing 21. The filter screen 22 (a plastic frame is tightly sealed around the outer end, and the outer side of the frame is in sealing contact with the limit plate) is tightly sealed in the four limit plates 28 of the filter housing 21. A plurality of bolts are screwed into the plurality of thread holes through the plurality of openings around the filter housing cover 23, and the filter housing cover 23 is sealed and installed on the filter housing 21. The inlet pipe 24 and the outlet pipe 25 have an opening in the middle that communicates with the inlet pipe and the outlet pipe, respectively. An isolation pipe 29 with an internal thread is vertically welded in each opening (located in the inlet pipe and the outlet pipe). The isolation pipe 29 divides the middle of the inlet pipe 24 and the outlet pipe 25 into two independent isolated spaces as a boundary. The isolation pipe 29 has a through hole 27 on the left and right sides, and a sealing bolt 26 is screwed into the isolation pipe 29 through a thread (the bolt isolates the middle of the inlet pipe and the outlet pipe as a boundary); the upper part of the outer end of the opening of the inlet pipe 24 and the outlet pipe 25 of each set of the filtering mechanism There is a thread hole, and the air inlet ends of the two sets of pressure sensors A2, A3 (A5, A6) are respectively screwed into the thread holes of the inlet pipe 24 and the outlet pipe 25 and installed on the inlet pipe 24 and the outlet pipe 25; the inlet pipe 24 of the two sets of filtering mechanisms and the outer ends of the two pipes 5 of the external compressor of the air conditioner body are respectively sealed and connected through pipe joints, and the outlet pipes 25 of the two sets of filtering mechanisms and the outer ends of the inlet pipes and outlet pipes of the indoor unit (not shown in the figure) are respectively sealed and connected through pipe joints; the power module A1, the comparison circuit 3, and the prompt circuit 4 are installed in the component compartment of the indoor unit of the air conditioner body 1.

[0017] Figure 1, 2 As shown in , the material of the filter mechanism 2 is stainless steel. The first set of comparison circuits includes resistors R1, R2, R3, R4 connected via circuit board wiring, and an op amp A4; the first resistor R1 and one end of the second resistor R2 are connected to the same-direction input terminal 3 of the op amp A4, the third resistor R3 and one end of the fourth resistor R4 are connected to the reverse input terminal 2 of the op amp A4, and the other end of the second resistor R2 and the other end of the fourth resistor R4 are connected to the negative power input terminal 4 of the op amp A4. The second set of comparison circuits includes resistors R6, R7, R8, R9 connected via circuit board wiring, and an op amp A7; the first resistor R6 and one end of the second resistor R7 are connected to the same-direction input terminal 3 of the op amp A7, the third resistor R8 and one end of the fourth resistor R9 are connected to the reverse input terminal 2 of the op amp A7, and the other end of the second resistor R7 and the other end of the fourth resistor R9 are connected to the negative power input terminal 4 of the op amp A7. The first set of prompt circuits includes a resistor R5, a transistor Q1 and an indicator light BH1 connected via circuit board wiring, one end of the resistor R5 is connected to the base of the transistor Q1, and the collector of the transistor Q1 is connected to the negative power input end of the indicator light BH1. The second set of prompt circuits includes a resistor R10, a transistor Q2 and an indicator light BH2 connected via circuit board wiring, one end of the resistor R10 is connected to the base of the transistor Q2, and the collector of the transistor Q2 is connected to the negative power input end of the indicator light BH2. The outlet pipes 25 of the two sets of filtering mechanisms can also be sealed and connected to the inlet pipe and the outer end of the outlet pipe of the indoor unit respectively through pipe joints. The inlet pipes 25 of the two sets of filtering mechanisms and the outer sides of the two pipes of the outdoor unit are sealed and connected respectively through pipe joints and are located at the side end of the indoor unit, so that the owner can clean the filter screen indoors. The power input terminals 1 and 2 of the power module A1 are connected to the two poles of the AC 220V power supply respectively through wires. The power output pins 3 and 4 of the power module A1 and the power input pins 1 and 2 of the four pressure sensors A2, A3, A5, and A6, the power input pins 7 and 4 of the op amps A4 and A7 of the two comparison circuits, the positive power input of the indicator light BH1 and the emitter of the transistor Q1, the positive power input of the indicator light BH2 and the emitter of the transistor Q2 of the two prompt circuits are connected through wires. The signal output pins 3 of the pressure sensors A2 and A3 are connected through wires to the 3 and 2 pins of the signal input op amp A4 of the first comparison circuit, and the signal output pins 3 of the pressure sensors A6 and A5 are connected through wires to the 3 and 2 pins of the signal input op amp A7 of the second comparison circuit. The 6 pin of the signal output op amp A4 of the first comparison circuit and the other end of the resistor R5 of the signal input of the first prompt circuit are connected through wires. The 6 pin of the signal output op amp A7 of the second comparison circuit and the other end of the resistor R10 of the signal input of the second prompt circuit are connected through wires.

[0018] Figure 1 , 2As shown, the present invention is based on the air conditioner body. When the air conditioner body 1 is working, according to the ambient temperature and the needs of the user, the user selects the working mode of the four-way valve of the air conditioner body 1 through the remote control panel, and the outdoor unit 1 and the indoor unit can be switched between the evaporation and condensation functions. When the indoor unit is in the evaporation state, the air conditioner body 1 provides a cooling mode for the indoor room, and when the indoor unit is in the condensation state, the air conditioner body 1 provides a heating mode for the indoor room. The above is an existing mature technology, and this application will not repeat it. In the present invention, when the air conditioner body 1 is working, when the air conditioner body is in the cooling mode in summer, the refrigerant liquid output by the compressor in the outdoor unit 1 is filtered by the filter 22 of the lower filter mechanism 2 and then enters the indoor unit. The indoor unit evaporates the refrigerant liquid to cool the indoor room, and after evaporation and heat absorption, the gas enters the compressor in the outdoor unit through the filter 22 of the upper filter mechanism 2 of the outdoor unit for compression, and after dissipating heat through the condenser, it is converted into liquid again and flows into the indoor evaporator to circulate and absorb heat for cooling the indoor room. When the refrigerant liquid flows into and out of the filter 22 of the lower filter mechanism 2, impurities (located at the left end of the filter) can be effectively filtered out. When the air conditioner is in heating mode in winter, the superheated gas output by the compressor in the outdoor unit 1 enters the indoor unit through the filter 22 of the lower filter mechanism 2. The indoor unit condenses the gas into liquid to heat the room. After condensation and heat absorption, the liquid enters the outdoor unit evaporator through the filter 22 of the upper filter mechanism 2 of the outdoor unit, releases cold and then converts into gas again. The compressor compresses the gas into superheated gas, and the gas is condensed again through the indoor condenser to convert into liquid circulation to heat the room. When the refrigerant liquid flows into and out of the filter 22 of the upper filter mechanism 2, impurities can be effectively filtered out (located on the right side of the filter). When the user or staff needs to clean the filter mechanism (for example, if they feel that the cooling or heating efficiency of the air conditioner body is lower than before), they tighten the bolts 26 of the two sets of filter mechanisms downward respectively, and the bolts isolate the middle of the liquid inlet pipe and the liquid outlet pipe as a boundary (the two bolts seal the through hole 27 of the isolation pipe), thereby preventing the refrigerant in the cleaned filter from escaping. Then, remove the filter housing cover 23, and then take out the filter 22. After cleaning out the impurities in the filter 22 and the filter housing, reinstall the filter and the filter housing cover 23, and loosen the bolts 26 of the two sets of filter mechanisms upward respectively. The bolts no longer isolate the middle of the liquid inlet pipe and the liquid outlet pipe (the bolts are located on the upper side of the through holes 27 on the left and right sides of the isolation pipe 25), and the refrigerant or heating agent output by the compressor can flow into and out of the filter mechanism normally.

[0019] Figure 1 , 2As shown, after the 220V AC power enters the power input terminal of the power module A1, the 3rd and 4th pins of the power module A1 output a stable DC 12V power supply and enter the power input terminals of two sets of comparison circuits, prompt circuits and four sets of pressure sensors. In the first set of comparison circuits and prompt circuits, the first and second sets of pressure sensors, when the left side of the lower filter is not blocked or blocked very little and does not affect the normal operation of the air conditioner body in the cooling mode of the air conditioner body, the pressure in the inlet pipe 24 (output liquid) at the left end of the filter mechanism is close to the pressure in both sides of the outlet pipe 25 at the right end, and the voltage signal output by the 3rd pin of the pressure sensor A2 enters the 3rd pin voltage of the operational amplifier A4 through the voltage division of the resistors R1 and R2 (for example, 2V), which is slightly smaller than the voltage signal output by the 3rd pin of the pressure sensor A3 enters the 2nd pin voltage of the operational amplifier A4 through the voltage division of the resistors R3 and R4 (for example, 2.1V), then the 3rd pin of the operational amplifier A4 outputs a low level, and the indicator light BH1 will not be powered, indicating that the filter mechanism at the lower end of the compressor is not blocked. When the lower filter is clogged and affects the normal operation of the air conditioner body, the pressure in the inlet pipe 24 at the left end of the filter mechanism increases due to impurities blocking and is higher than the pressure in the outlet pipe 25 at the right end. The voltage signal output by pin 3 of the pressure sensor A2 enters the voltage of pin 3 of the operational amplifier A4 (for example, 2.2V) through the resistors R1 and R2, which is greater than the voltage signal output by pin 3 of the pressure sensor A3, which enters the voltage of pin 2 of the operational amplifier A4 through the resistors R3 and R4. Then, pin 3 of the operational amplifier A4 outputs a high level, which enters the base of the transistor Q1 through the resistor R5 for voltage reduction and current limiting. The transistor Q1 is turned on and the collector outputs a low level, which enters the negative power input terminal of the indicator BH1. The indicator BH1 is powered on and illuminates, indicating that the filter mechanism at the lower end of the compressor is clogged. In the second set of comparison circuits and prompt circuits, the third and fourth sets of pressure sensors, when the air conditioner is in heating mode, the right side of the upper filter (outputting liquid) is not blocked or the blockage is very small and does not affect the normal operation of the air conditioner, the pressure in the inlet pipe 24 at the left end of the filter mechanism is close to the pressure in both sides of the outlet pipe 25 at the right end, and the voltage signal output by pin 3 of the pressure sensor A6 enters the voltage of pin 3 of the operational amplifier A7 through the voltage division of resistors R6 and R7 (for example, 2V), which is slightly smaller than the voltage signal output by pin 3 of the pressure sensor A5 enters the voltage of pin 2 of the operational amplifier A7 through the voltage division of resistors R8 and R9 (for example, 2.1V), then, pin 3 of the operational amplifier A7 outputs a low level, the indicator light BH2 will not be energized, indicating that the filter mechanism at the upper end of the compressor is not blocked.When the upper filter is blocked and affects the normal operation of the air conditioner body, the pressure in the outlet pipe 25 at the right end of the filter mechanism increases due to the blockage of impurities and is higher than the pressure in the inlet pipe 24 at the left end. The voltage signal output by pin 3 of the pressure sensor A6 enters the voltage of pin 3 of the operational amplifier A7 (for example, 2.2V) through the voltage division of resistors R6 and R7. The voltage signal is greater than the voltage signal output by pin 3 of the pressure sensor A5 and enters the voltage of pin 2 of the operational amplifier A7 through the voltage division of resistors R8 and R9. Then, pin 3 of the operational amplifier A7 outputs a high level, which enters the base of the transistor Q2 through the voltage reduction and current limiting of resistor R10. The transistor Q2 is turned on and the collector outputs a low level, which enters the negative power input terminal of the indicator light BH2. The indicator light BH2 is powered on and illuminates, indicating that the filter mechanism at the upper end of the compressor is blocked.

[0020] Figure 1 , 2 As shown above, the present invention can filter out impurities in the two pipes connected to the compressor in real time. When necessary, the owner can check or clean the impurities filtered out by the filter by himself or ask maintenance personnel at an appropriate time, thereby minimizing the adverse effects of impurities blocking the pipeline on the operation of the air conditioner body; when the amount of impurities is relatively large and affects the flow rate of the fluid, the owner can be notified at the first time, and the owner can understand the specific reasons for the abnormal operation of the air conditioner body, thereby improving the function of the air conditioner body and the market competitiveness of the product, and preventing the owner from being unaware and the maintenance staff from charging more. The operational amplifiers A4 and A7 are of model UA741; the transistors Q1 and Q2 are of model 9013 (NPN transistors); the indicator lights BH1 and BH2 are red incandescent indicator lights (1W), and the light-emitting surface is located outside the front end of the inner casing, and light-emitting diodes may also be used; the resistance values ​​of resistors R1, R2, R6, and R7 are 6K; the resistance values ​​of resistors R3, R4, R8, and R9 are 5.9K, 6.1K, 5.9K, and 6.1K respectively; the pressure sensors A2, A3, A5, and A6 are small pressure transmitters of model XK-CXQ-131, which have two power input terminals and one signal output terminal (which can output voltage signals varying between 0-10V); the power module A1 is a finished product of an AC 220V to DC 12V power module.

[0021] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An air conditioning device capable of automatically detecting blockage, comprising an air conditioner body, a filter mechanism, and a pressure sensor, characterized in that: It also has a comparison circuit and a prompt circuit; the filtering mechanism includes a filter shell, a filter screen, and a filter shell cover, the filter shell is respectively provided with a liquid inlet and a liquid outlet on both sides, the filter screen is installed in the filter shell, and the filter shell cover is installed on the filter shell; the liquid inlet and the liquid outlet are respectively provided with openings, each opening is provided with an isolation tube, the isolation tube is respectively provided with through holes on both sides, and sealing bolts are threadedly installed in the isolation tube; pressure sensors are respectively installed on the upper part of the inlet pipe and the outlet pipe of each set of filtering mechanisms; the inlet pipe of the filtering mechanism is connected to the outer end of the pipeline of the external compressor of the air conditioner body, and the outlet pipe of the filtering mechanism is connected to the pipeline of the internal unit; the comparison circuit and the prompt circuit are installed in the component compartment of the internal unit, the signal output end of the pressure sensor is electrically connected to the signal input end of the comparison circuit, and the signal output end of the comparison circuit is electrically connected to the signal input end of the prompt circuit.

2. The air conditioning device capable of automatically detecting blockage according to claim 1, characterized in that: The filter mechanism is made of stainless steel.

3. The air conditioning device capable of automatically detecting blockage according to claim 1, characterized in that: The comparison circuit includes electrically connected resistors and an operational amplifier, wherein one end of the first resistor and the second resistor are connected to the same-direction input terminal of the operational amplifier, the third resistor and the fourth resistor are connected to the reverse input terminal of the operational amplifier, and the other end of the second resistor and the other end of the fourth resistor are connected to the negative power supply input terminal of the operational amplifier.

4. The air conditioning device capable of automatically detecting blockage according to claim 1, characterized in that: The prompt circuit comprises an electrically connected resistor, a triode and an indicator light, one end of the resistor is connected to the base of the triode, and the collector of the triode is connected to the negative power input end of the indicator light.

5. The air conditioning device capable of automatically detecting blockage according to claim 1, characterized in that: The filter mechanism can also be installed on the side end of the inner machine.

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